burkman



Sept. 13, 1927.

J. A. BURKMAN HOT WATER FURNACE Filed Dc. 21, 1925 3 sheets-sheet 2 Inventor Attorney Sept., 13,1927. A 1,642,600 J. A. BURKMAN HOT WATER FURNACE Filed Deo.21, 1925 5 sheets-snee; 3

\ m m N y l v Inventor By c /lyorney Patented Slept.` `13, '419827.

' JOHNAUGUSTIBURKMALN;orfronmnistmnniv; emunio; camina.

Hoihwnfmnit FUJtNAeEL..

Y Thefpresent iiiventionfpertainsf,to a-no.vel hotwater "furnace .designed toheat water for circulation Aor for. the production of' Theprincipal object'of. thefinventionis Iitlifeiprovision of" al `device 'off thisv character inwhichthehot gases issuinggfromthe grate are causedy to how. through superfheating., fines surroundingV the boiler before being. emitted to ythe atmosphere. .'Inthe accom-f L -1 plishment of this. object, thef boiler consists of' a `doublewalled boXslike member, the

space' within, the double walls constituting;

the Water space. The hre'boXis theiiiterior o ftheboileror the spaceV surround'edlby the.

livinner inembersuofy the double.'walls.y The bottom of the boiler is openfor.4 the purposev ofreceiving a grate.,l Anoutletor. passageisY provided from the upper-part of the lire box,

through the rear wall of' the VboilerV and int() A -y a fluewhich twice surrounds.. the remaining walls.: The gasesissuingfronithe hre box, iii-passing.througlithis fine serve as 'a super.; heati'ngdevice `the `contents of the boiler. Finally, the gases that .have passed through 25, ythe hue y'are' exhausted'V to :the atmosphere.. damper device is provided at'theiiiilet:of'the i'lue,. whereby th e!v gases may be. .discharged f from the interior ofi the boiler directly Ato. the,

lowing description and in the accompilllyillg"v Figure 1V isa perspective Vview off the" boiler. and .attachedffluesy A v f Figure2 is a similar View' in a different position;4 y v Figure 3' isa longitudinal vertical section g' Figure 4 is a Vverticali section onA the line ployed to designate corresponding parts` throughout.

The body or boiler of the device is a boX- like member 1 having double walls as shown supported upon a base casting 4. n The forward wall 5 of th-e boiler has an opening 6 for charging, and the rea-r wall 7 has a passage 8 communicating with the flue defextensive therewith.

in Figure 3. andan open bottom 2. 'This' structure rests on a grate frame 3 which is scribed' in detail. helhwg Tubes 9' aree'xh .tended between the. forward and rear walls,

in communication therewith,.asillustratedin Thegratefframe.` has al rectangular opeii ing. 10` substantially the.. same sizeas the.y

`recess 2"infthe-bottoin of? the boiler.V The opening, 1'() is surroundedfby a hangen for" rI lhe lower-` better supporting the boiler. portion'll of'tliis flange supportsV a vpair of' krotatable gratebars 12 by meaiisofcranks i 13"extending`from the bars into the flange. `Y

At-the for-ward-eiidthe cranks arefezztendedl beyond the f lange lland'are pro'videdwith inter-engaging" segmentsf14` as shown .inf Figure 4. One oi" the cranks is still further handle 16 by which itV 'may beturned'to efextended as at`1'5 through thel front wall of|` i y the base. 4i and there equipped' withba v feet a rocking `ino'vein'ent ofthe r grate bars.,

.A stop 17- ltliioject'ing from the'rear .part

of the Hnge limits vthe movement of the' bars.VV Y Y The b oiler is surroundedfbyf a circuitous. hue whichrv 'starts att-the rear walloi'fitheboiler, passes 't-wice along [the #remaining f walls, r z iiidnends` near its inlet.V 'The inlet" part ofthe flue comprises laninclined branch 1 This branch 'extends downwardly to' the'bottom ofthefright han'di side- 1'9 of the boiler. From this point-"fitV 'continues' along thefo'llowing course: A con-Y 18 communicating with thepassage Q8A and co# duitl 201 extending t'o the' front" end ofthe s1de19; a conduit. 21 alngythe forward: end 22 of the boiler, a condiiit23froni the lowerY forward corner* to theupper'rearcorner of.

the wall'w24of: the" boiler, a horizontal conduit 25 rom the upper rear corner to the upperforward corner of the wall 24, a conduit26 along the upper edge of the front wall 22,7a conduit 27 from the upper forward corner to the upper rear corner of the A wall 19, and finally the outlet end 27 which lies adjacentthe inlet v18 and is open as shown in Figure 1.

The upper end of the inlet branch 18 is open and may be closed by a damper 28 mounted therein and operable by a rodl 29 projecting therefrom. This rod may be suitably connected by a chain or similar device for operation from the floor. In consequence of the described arrangement of flues, the hot gases rising from the grate pass along the tubes 9 and through the passage 8. If the damper 28 is closed the gases proceed along the various :llue branchen in the quence in which theyT :ire deeeribed above. These conduits muy be welded or otherwise secured to the boiler which preterubly cust as un integral structure.

The boiler und ilues :ire eneloeeiil by ii `lor- Wurd Wall 30, u rear will 3l, und leterol Walls 32. Theee nur.; be lorinetl es integrer parts oil the llue conduits iili' desired. Cui the upper edges of these Welle is supported i hollow rectangular plete 33 :it the rear end of which is liorined :1- collor Si for honnection to :i chimney. This coller elonrnted as shown in Figure 5, oeiini` placed directly over und co-exten 7o with the :ilined upper ends of the conduits 18 und Thus. the

gases issuingmn lroin the outlet conduit ill" 4after passing through the other llue con- `ont llowing through the illue coiuluits.

duits, are exhuueled into the chimney. ,lt Will also be uppurent that it the duinper QS is open, the gases will poss directly into the chimney 'troni the interior oi the boile willi- 'lhe enclosin` structure is completed by ineens of a top plate 35 resting on the 'ti-aune 323 :is shown more cleurly in lligures 3 und The charging opening;n G in the foi-word Wall ot the boiler is norn'nilly closed by u. fire door S6 hiiuredlyv mounted on the 4trent wall 30. Also, the loi-wurd 'ir-ull ot the linee 4: has un :ish door 3T in which is lfornied u drutt demper 3S lor obvious purpos 1.

The lower corners ot the trout upper eonduit QG :1re :formed with iiiiun'tures 39 es shown in Figure These upertures :ire normally closed by incarne olf doors dell uiounlied on the front will l0 shown in liiirures and 7. lVlien these doors :ire removed eccess to the :lines tor elearning the suine is possible. Euch door lll is uupijiorted in closed position by ineens ol n parir olf lutches 1ll projecting :troni the Vertical edges lzliereol and .receivable upon lugs i2 l'ornied 'with the tront woll lll ne shown in .liejure T.

While u speeilic embodiment ol the invertion has been illustrated und described, it is nefieeoo el ninos. n i.

Hoving thus fully described the invention,` what l clunn es nenT und desire to protect f by Letters Potent is:

l. rr hot wider iturnuee comprising u double 1oiled boiler having un open betteln, the Writer splice beineI in the double Wells thereolf, :i flue con'nnencingl; :it the rear Woll oit the boiler :ind twice eiufrouiulinel the renieining mills, returning to the reur vull, solid rear mill honing.' ai pussige permittingl communieution between the interior ot the boiler und the inlet end ol the ilue, the ren'niining end oi the liuc being open, another Woll ot the boiler having` u thrmlgh recess permitting access lo the interior oit the boiler, seid recees beine' disposed above the grote, :L lire door nori'nully corerin,r Suid recess, und tubes enteiuliiub` between opposite wells of the boiler und eoinnniuiceting therewith.

El. In u urnuce including :L rectangular elniped boiler having :i combustion chamber und u double Voiled Water circulatingI chu1nber und provided 1with un outlet 'tor the conibuelilgile gases in the upper rear well, a gos cireuluiting)r `llue in eonnniinicotion with the seid outlet` extending.' dingonully downward :l'roin the upper cenlirnl portion oit the reni' nell to the lower corner, extending torn wordtv :dong one side well und laterally oei-os llie lower edge o't the lfront full und (unending upon the opposite side iroin the .louer loruurd corner lo un upper posilzifjln ut the reni' end und then continuingabout the upper edges olf the side Wells und :iront null to lern] u return llue und coininunieeting ut the reur wull with un exhaust ilue.

ln witness whereof I hure hereunto set my hund.

l O ll N All (i UST BURKMAN. 

